The Domestic Buildings Research Group (DBRG) are a group of volunteers who have been studying and
recording the historic buildings of Surrey for the past 40 years. They have recorded more than 4,000
buildings — and have distilled their experience of historic building features into an Illustrated Glossary,
which is available on-line.

This is an invaluable guide to the sometimes obscure architectural terms used to describe the different
timbers in an ancient oak frame (just what is a ‘jowl post’?) or old brickwork (a ‘rat-trap bond’?).
Each architectural term appears in the glossary linked to an illustration that makes it clear.

The terms are grouped in six categories, with an introduction and index: